I have a tin of Master Penman, but I like to let my tinned aromatics set for a long while before I pop them. I think (and this is just my own deluded illusion) that tinned aromatics tend to absorb more of the toppings with time, and allows a little more of the tobacco to shine through for a more balanced flavor. But, as I said, I have not been told this. Plus, I have so many tins, and I only smoke aromatics once in the mornings, so... it takes me a while to get to some of my aromatic options.
FWIW, I think that my five year old MacBaren's Vanilla Flake and Solani Mango Flake really tastes better than the fresh. But, YMMV